JP2002093496A - Card edge connector assembly - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily confirm the soldered state of contacts in a multi-stage card edge connector assembly. SOLUTION: One contact 12 is provided with a main body 12a, curved contact pieces 12c and 12c extending into receiving recesses 2 and 4 through contact piece insertion grooves 39 and 41, and a tine 12d at the lower end of the body 12d. The other contact 13 comprises contact members 14 and 15 and a conductive member 17 electrically connecting them at the rear section of a housing 6. A tine 15g is formed at the lower end of the contact member 15. The contact 12 is fitted from the rear section of the housing 6, and the contact members 14 and 15 of the contact 13 are fitted from the front section of the housing 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a card edge connector assembly for mounting a daughter board, and more particularly to a card edge connector assembly having a plurality of rows of daughter board receiving recesses.

[0002]

2. Description of the Related Art As a card edge connector assembly of a type for receiving a plurality of rows of, for example, two daughter boards, Japanese Patent No.
There is known an electrical connector for a module board of a two-stage superimposed horizontal type disclosed in Japanese Patent No. 022230.
The electrical connector has contacts extending into each of the upper and lower daughter board receiving recesses. The tines of all these contacts, i.e. the legs of the contacts connected to the parent board, are located on the side of the housing opposite to the side where the daughter board is inserted.

[0003]

In the above-described conventional electrical connector, the tines of the contacts for the lower sub-substrate receiving recess are hidden by the tines of the contacts for the upper sub-substrate receiving recess, so that they can be visually recognized from the outside. Not be able to
It is difficult to visually inspect the soldering state of the mother board. Further, even if it turns out that the soldering is defective, it cannot be repaired because a soldering tool cannot be inserted into the defective part.

Further, since the pitch of the tines in each row in the row direction is half the pitch of the contacts, the interval between the connecting portions to the parent substrate is reduced, and the short-circuit between the solders for fixing to the parent substrate is reduced. So-called solder bridges are likely to occur. As a result, defective products are likely to be produced.

Although it is conceivable to provide the tines of the lower contact on the sub-substrate insertion side among the contacts for the upper sub-substrate receiving recess, it is necessary to prevent insertion of the sub-substrate into the lower sub-substrate receiving recess. Become.

The present invention has been made in view of the above points, and a card edge connector assembly capable of easily confirming the soldered state of contacts of a card edge connector assembly having a plurality of stages of daughter board receiving recesses by visual inspection. The purpose is to provide.

It is another object of the present invention to provide a card edge connector assembly in which tine solder bridges are less likely to occur.

[0008]

SUMMARY OF THE INVENTION A card edge connector assembly according to the present invention is provided with an insulating board extending in a longitudinal direction and formed in a plurality of steps in a vertical direction at a front portion thereof and attached to a parent board. And a plurality of contacts arranged in a longitudinal direction on the upper and lower sides in each daughter board receiving recess, and each contact is arranged on an upper contact piece arranged on the upper side or on a lower side. The lower substrate has one of the lower contact pieces and is connected to the parent board via tines, and the parent board and the child board are electrically connected to each other by mounting the child boards in the respective child board receiving recesses and making contact with the contact pieces. In an interconnecting card edge connector assembly, a plurality of contacts are mounted across the steps from the rear of the housing, with multiple contact pieces on either side and tines at the rear. And a plurality of separate contact members each having a contact piece on the other side mounted on each stage from the front of the housing, the contact members avoiding the child substrate receiving recess. The contact member, which is interconnected by a conductive member at the rear and located at the lowest level, includes a plurality of second contacts having tines.

[0009]

According to the card edge connector assembly of the present invention, a plurality of contacts arranged in a longitudinal direction on the upper and lower sides in each daughter board receiving recess extend from the rear of the housing to each step. A plurality of integral first contacts having contact pieces on either side and having tines at the rear, and a plurality of contact pieces having contact pieces on the other side respectively mounted on each step from the front of the housing. A plurality of second contacts having a separate contact member, the contact members being interconnected by a conductive member at a rear portion avoiding the daughter board receiving recess, and a contact member located at the lowermost stage having tines; , The tines are arranged separately on the front and rear of the housing, and their soldered state can be easily visually recognized. As a result, defective products can be eliminated, or even if soldering is defective, it can be easily repaired, and the quality and yield of products can be improved. Further, since the tines are distributed to the front and rear of the housing, it is not necessary to make the pitch too narrow, so that the solder bridge is hardly generated. Therefore, defective products are unlikely to occur.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a card edge connector assembly (hereinafter, simply referred to as "assembly") of the present invention will be described below in detail with reference to the drawings. FIG.
1 shows an assembly of the present invention when configured as a two-stage stacked horizontal type, FIG. 1A is a plan view of the assembly, FIG. 1B is a front view, and FIG. Each figure is shown. Hereinafter, description will be made with reference to FIG. The assembly 1 includes an upper sub-substrate receiving concave portion (second sub-substrate receiving concave portion) 2 and a lower sub-substrate receiving concave portion (first sub-substrate receiving concave portion) 4.
0 (FIG. 1 (B)). Hereinafter, these child substrate receiving concave portions 2 and 4 are simply referred to as receiving concave portions 2 and 4.

Two rows of parallel receiving recesses 2, 4 (FIG. 1)
(B)) extends along the longitudinal direction of the housing 6, and a plurality of contacts 12 (first contacts) (14, 15 (FIG. 2)) face the receiving recesses 2, 4, that is, a rear portion of the housing 6, that is, FIG. In A), it is attached to the upper part.
As shown in FIG. 1A, daughter boards (cards) 96 and 98 are inserted into these receiving recesses 2 and 4 from the front of the assembly 1. (The lower sub-substrate 96 is referred to as a first sub-substrate, and the upper sub-substrate 98 is referred to as a second sub-substrate.) FIG.

At both ends of the housing 6, receiving recesses 2,
4, two pairs of latch members 8, 8, 10, and 10 are attached, respectively, so that the inserted daughter boards 98, 96 are locked by these latch members 8, 10, respectively. . Each pair of latch members 8, 10 is symmetrical in each pair. Note that the upper latch members 8 and 8
As shown in (C), it is rotatably attached to a support shaft 22 protruding integrally with the housing 6. In addition, this support shaft 2
2 may be a member separate from the housing 6.

The housing 6 has latch members 8, 8, 1
Plates (connecting members) 16 and 18 having a substantially rectangular planar shape extending to both ends of the housing 6 corresponding to 0 and 10 are attached. Each of the plates 16 and 18 is stamped and formed from one metal plate. As shown in FIG. 1A, the upper plate 16 has a flat main surface 24, and a rear surface 26 extending in the same direction as the main surface 24 through a step 21 extending in the longitudinal direction of the housing 6 at the rear. Are formed.
A cross section L around the rear surface of the housing 6 is provided at both ends of the rear surface.
A letter-shaped mounting portion 28 extends.

Notches 32, 32 extending in the longitudinal direction of the plate 16 are formed near both sides of the front end 30 of the plate 16. A substantially rectangular holding plate 36 that engages with the outside of the upper-stage latch member 8 is formed through a step 34 extending from each notch 32 toward the front end 30. The front end 30 of the holding plate 36 converges inward in accordance with the outer shape of the upper latch member 8. The holding plate 36 is used to prevent the latch member 8 from opening and being disengaged from the daughter board after the daughter board (second daughter board) 98 is inserted and engaged with the latch member 8. Things. The reason why the main surface 24 is positioned relatively higher by the steps 21 and 34 is to secure a space for an IC (not shown) mounted on the daughter board 98. The plate 18 will be described later.

Next, the sectional shape of the assembly 1 will be described with reference to FIG. FIG. 2 (A) is 2A-2A of FIG. 1 (A).
2B is a cross-sectional view taken along the line, and FIG.
It is sectional drawing which follows a line. As shown in FIG. 2A, the housing 6 has upper and lower contact insertion holes (hereinafter, referred to as “contact insertion holes”) for attaching the contacts 12 from the rear of the housing 6.
2B, and upper and lower insertion holes 42, 44 for attaching the contact members 14, 15 from the front as shown in FIG. 2B at positions displaced in the longitudinal direction of the housing 6. . The insertion holes 38 and 40 are vertically aligned (aligned) and communicate with the receiving recesses 2 and 4. Similarly, the insertion holes 42 and 44 are vertically aligned (aligned), and are adjacent to the receiving recesses 2 and 4. Also,
Contact piece insertion grooves 39 and 41 communicating with the receiving recesses 2 and 4 are formed adjacent to the insertion holes 38 and 40.

The contact 12 has an elongated body 12a extending vertically, which is disposed in a contact receiving groove 23 formed in the housing 6, and insertion holes 38, 4 extending from the body 12a.
The mounting tabs 12b, 12b which are press-fitted into the contact tabs 0, and contact piece insertion grooves 39, 41 from the mounting tabs 12b, 12b.
At the lower end of the main body 12a are curved contact pieces (upper contact pieces) 12c, 12c respectively extending into the receiving recesses 2, 4 via the contact holes 12c, 12c, and tines 12d to be soldered to conductive pads (not shown) of the motherboard 20. Since the tines 12d protrude from the rear part of the housing 6, the soldering state can be visually recognized from the outside.

The tips of the contact pieces 12c, 12c have contacts 12f, 12f electrically connected to conductive pads (not shown) of the daughter board inserted into the receiving recesses 2, 4.

Upper wall 2 defining receiving recesses 2, 4
It should be noted that a, 4a is inclined upward at a steep angle, so that the daughter board can be inserted into the receiving recesses 2, 4 at this angle. In FIG. 2A, the step portion 21 and the mounting portion 28 of the upper plate 16 are clearly shown. The lower latch member 10 has a press-fit piece (not shown) having a barb (stab) on a side edge, and is attached to the housing 6 by inserting the press-fit piece into a groove (not shown) of the housing 6. Therefore, the latch member 10 is fixed so as not to rotate vertically with respect to the housing 6.

Next, the contact members 14 and 15 will be described. The contact members 14, 15 extend horizontally from the main bodies 14a, 15a and the main bodies 14a, 15a, and the through holes 42, 44
Mounting tabs 14b, 15b respectively press-fitted into the main body 1
There are contact pieces (lower contact pieces) 14c and 15c that extend into the receiving recesses 2 and 4 while being curved from 4a and 15a.
The tips of the contact pieces 14c and 15c serve as contacts 14f and 15f that come into contact with electrodes (not shown) of the daughter boards 96 and 98. A vertically long groove 25 is formed in the rear part of the housing 6 in alignment with the contact members 14 and 15, and a U-shaped connecting piece (conductive member) 17 formed by stamping a metal plate into the groove 25 is arranged. You. Contact legs 17 a, 17 are provided at both ends of the connecting piece 17.
a is formed, and a mounting tab 17b is formed between the contact legs 17a, 17a. Contact legs 17a, 17
Outward projections 17c are formed at the tip of a. The mounting tabs 17b are pressed into the corresponding grooves 46 of the housing 6 and fixed, and the contact legs 17a, 17a are inserted into the corresponding grooves 42a, 44a of the housing 6. Groove 42
a, 44a communicate with and are adjacent to the insertion holes 42, 44, respectively, so that the contact legs 17a, 17a
The contact members 1 contact the mounting tabs 14b and 15b of the
4 and 15 are electrically connected. As a result, the contact members 14 and 15 are integrated with the integrated contact (second contact) 1
It becomes 3. At the lower end of the contact member 15, a tine 15g extending forward and outward of the housing 6 is formed.
Therefore, the tines 15g can be visually recognized from the outside, and the soldering state with the parent board can be confirmed. Tine 15
Since the g and the tine 12d are respectively distributed before and after the housing 6, the pitch is the same as that of the contacts 12 and 13, and the pitch is not excessively narrow. Solder bridges are less likely to occur. In the present embodiment, the first contact 12 has the upper contact piece 12c,
Although the second contact 13 has a configuration having the lower contact pieces 14c and 15c, the contacts 12 and 13 may have the opposite contact pieces 14c, 15c and 12c, respectively.

Next, referring to FIG. 3, the lower plate 18 will be described.
Will be described. 3A is a plan view of the plate 18, FIG. 3B is a front view, and FIG. 3C is a side view. The plate 18 has a substantially rectangular shape like the plate 16 as best shown in FIG. Rectangular mounting pieces 50, 50 bent upward with respect to the main surface 48 of the plate 18 are formed at both rear ends of the plate 18. Each mounting piece 50 has two mounting holes 52, 52 arranged in parallel with the main surface 48. The upper or upper latch member 8 is attached to the attachment holes 52, 52, and the details of attachment will be described later.

At the front of both edges 54 of the plate 18, rectangular holding plates 56, 56 bent downward are formed. The holding plate 56 is formed so as to converge inward similarly to the holding plate 36 of the plate 8 that covers the latch member 8. The lower end 58 of the holding plate 56 slightly expands outward. Substantially rectangular openings (overstress prevention means) 60, 60 are formed in the main surface 48 near the rear end of each holding plate 56. The outer edge 60a of each opening 60 extends rearward to form a slot 60b at the rear of the opening 60. The opening 60 cooperates with the upper latch member 8, but will be described later in detail.

Next, the upper latch member 8 will be described with reference to FIG. FIG. 4A is a side view of the latch member 8,
4B is a plan view, FIG. 4C is a side view of the other side,
FIG. 4D shows front views. The latch member 8 is formed by punching and bending a single metal plate. An elongated plate portion or arm 62 and a child substrate holding portion 64 on the front end side of the plate portion 62, that is, on the left side in FIG. Is formed. At the rear end of the flat plate portion 62, a hole 65 pivotally connected to the support shaft 22 (FIG. 1C) of the housing 6 is formed. The sub-board holding portion 64 is formed by bending a sub-substrate holding piece 66 formed on the upper edge of the front end portion of the flat plate portion 62 and a hook-shaped hook portion 68 formed by bending the front end of the flat plate portion 62 inward and protruding.
Having.

The sub-board holding piece 66 has a taper 66a inclined inward, that is, toward the holding sub-board (second sub-board) 98.
And a stop surface 66b for holding the child substrate 98. The taper 66a is used when the child substrate 98 is inserted.
8 and bends the flat plate portion 62 outwardly so that the daughter board 98 can be received. When the received child substrate 98 reaches the stop surface 66b, the flat plate portion 62 resiliently returns, and the child substrate 98 is pressed by the stop surface 66b so as not to return upward. The hook portion 68 is engaged with the arc-shaped notch 98a (FIG. 7A) of the daughter board 98 to prevent the daughter board 98 from slipping forward, that is, leftward in FIG. 4B.

As best shown in FIGS. 4B and 4C, a fixing piece 70 extending upward and bent in parallel to the flat plate portion 62 is provided near the upper edge 62a of the flat plate portion 62 near the hole 65. Is formed. The bent front end of the fixing piece 70 is formed as an elastic contact piece 72 that is further bent at a right angle to the flat plate portion 62 and extends toward the daughter board holding portion 64. The tip of the elastic contact piece 72 is bent upward, and the ground electrode (not shown) of the mounted sub board 98 is provided.
And the tip of the sub-substrate 98 is grounded. A gap G for receiving the mounting piece 50 of the plate 18 is formed between the fixing piece 70 and the flat plate portion 62.
(B). The fixing piece 70 has a mounting hole 5 of the plate 18.
A protrusion 74 is formed at a position corresponding to 2 toward the flat plate portion 62 side.

On the lower edge 62b of the flat plate portion 62, an overstress prevention piece 76 is formed at a position corresponding to the tip of the elastic contact piece 72 so as to prevent excessive deformation of the elastic contact piece 72. It has become. The lower edge 6 of the flat plate portion 62
On the opposite side of the sub-board holding portion 64 of 2b, there is formed an extension 77 extending at a right angle to the flat plate 62 and a regulating piece 78 having an L-shaped portion 80 extending further downward from the extension 77. . The L-shaped portion 80 has a protruding piece 80 a extending rearward in parallel with the plate-shaped portion 62.

Next, a sub-assembly in which the upper latch member 8 is attached to the lower plate 18 will be described with reference to FIG. FIG. 5A is a plan view of the subassembly 19, and FIG.
5B is a front view, and FIG. 5C is a side view. Each latch member 8 attaches the fixing piece 70 to the attachment piece 50 of the plate 18 so that the elastic contact piece 72 is on the inside. At this time, the two protrusions 74 of the fixing piece 70 of the latch member 8 (FIG. 4)
(C) shows two mounting holes 52 of the plate 18 (FIG. 3).
(C), the L-shaped portion 80 of the latch member 8 enters the opening 60 of the plate 18. When intruding, the protrusion 80 a of the L-shaped portion 80 passes through the slot 60 b of the opening 60, and the protrusion 80 a is disposed below the main surface 48 of the plate 18.

When no external force is applied to the daughter board holding portion 64, the projecting piece 80a is shifted from the opening 6 shifted from the slot 60b.
It is located in the 0 part. That is, the position is as shown in FIG. Therefore, the upward force A (FIG. 5) is applied to the latch member 8.
Even when (B)) is applied, the protruding piece 80a abuts against the main surface 48 of the plate 18 from below and restricts further movement, so that the latch member 8 is prevented from coming off the plate 18. . The latch member 8 is an L-shaped part 8.
The flat plate portion 62 can move when the flat plate portion 62 receives the sub-substrate 98 within a range where 0 can move in the direction indicated by the arrow B (FIG. 5A) within the opening 60. In this manner, the latch member 8 and the plate 18 are integrally assembled to form a plate sub-assembly 19. Thus, the opening 60 and the projection 8
Oa cooperates to prevent overstress of the latch member 8.

Next, referring to FIG. 6 and FIG.
The method of attaching 6, 98 will be described. FIG. 6A is a side view of the assembly 1 showing the sub-assembly 19 rotated around the support shaft 22 of the housing 6 and opened, and FIG.
FIG. 6C is a plan view cut along the line 6-6 in FIG.
Shows front views. FIG. 6 shows a state in which the upper plate 16 is removed from the assembly 1. FIG.
7A shows a state in which the sub-assembly 19 is closed after the lower-level sub-substrate (first sub-substrate) 96 is attached, FIG. 7A is a plan view, FIG. 7B is a front view, and FIG. C) shows a side view with the upper plate 16.

As shown in FIG. 6, it is clearly shown that the sub-assembly 19 is attached via the latch member 8 to the support shafts 22 projecting from both ends of the horizontally long housing 6. Projecting portions (supporting portions) 82 are provided on both ends of the rear portion of the housing 6 so as to protrude outward. The projection 82 is provided in the subassembly 19
However, when opened to mount the daughter board 96, the upper edge 62c near the rear of the flat plate portion 62 of the latch member 8 abuts to maintain the subassembly 19 in an open state, that is, a retracted state. In this state, the lower sub-substrate 96 is obliquely inserted into the lower receiving recess 4 as shown in FIG. 6A and is pushed down (rotated) as shown by the arrow C to latch the latch member 10. Attached to. As described above, before the latch member 8 is inserted into the child board 96, the child board 96 is
The latch member 8 does not hinder the insertion of the child board 96.

FIG. 6B shows a state where the daughter board 96 is attached to the latch member 10 by imaginary lines. However, FIG. 6 (C)
Does not show the child substrate 96. After attaching the daughter board 96, the sub-assembly 19 is rotated on the lower board 96 as shown by an arrow D in FIG. At this time, the holding plate 56 of the plate 18 is located outside the sub-substrate holding portion 84 of the latch member 10 to prevent the sub-substrate holding portion 84 of the latch member 10 from bending outward and the sub-substrate 96 coming off. . Since the lower end 58 of the holding plate 56 is slightly expanded, the holding plate 56 serves as a guide for aligning each other when engaging with the daughter board holding portion 84.

The lower latch member 10 has the same shape as the upper latch member 8. The flat plate portion 10a of the latch member 10 is folded at the upper edge of the rear portion to
Elastic contact piece 10b grounded to sub-substrate 96 in the same manner as
Further, an overstress prevention piece 10c similar to the latch member 8 for preventing overstress of the elastic contact piece 10b protrudes inward from a lower edge of the flat plate portion 10a.

As shown in FIG. 7A, the lower latch member 10 is covered by the subassembly 19 and cannot be seen from above. FIG. 7B shows that the outward movement of the latch member 10 is restricted by the holding plate 56. The upper sub-substrate 98 is inserted into the upper receiving recess 2 obliquely as shown in FIG. 7 (C), turned in the direction indicated by the arrow E, and attached to the latch member 8. FIG. 7A shows the child board 98 in the attached state. After the daughter board 98 is attached, the upper plate 16 is
1B, the holding plate 36 of the plate 16 is disposed outside the sub-board holding section 64 as best shown in FIG. 1 (B), and the bending of the sub-board holding section 64 outward is restricted.
Thus, the assembly 1 is completed.

Although the present invention has been described in detail with reference to preferred embodiments, the embodiments are merely illustrative and not restrictive. For example, the assembly 1 is of a type mounted horizontally on the mother board 20, but may be of a type mounted vertically. In this case, although the dimension in the height direction is increased, there is an advantage that the mounting area on the parent board is reduced.

[Brief description of the drawings]

1 shows an assembly of the present invention, FIG. 1 (A) is a plan view of the assembly, FIG. 1 (B) is a front view, and FIG. 1 (C) is a side view.

2 (A) is a sectional view taken along line 2A-2A of FIG. 1 (A), and FIG. 2 (B) is a sectional view of 2B-2B of FIG. 1 (A). The sectional views along the line are shown.

FIG. 3 shows a lower plate, FIG. 3 (A) is a plan view of the plate, FIG. 3 (B) is a front view, and FIG. 3 (C) is a side view.

4 (A) is a side view of the latch member, FIG. 4 (B) is a plan view, FIG. 4 (C) is a side view of the other side, FIG. 4 (D). Shows front views.

5A and 5B show a subassembly in which an upper latch member is attached to a plate, and FIG. 5A is a plan view of the subassembly;
5B is a front view, and FIG. 5C is a side view.

6 (A) is a side view of an assembly showing a state in which the sub-assembly is opened by rotating the sub-assembly around a support shaft of the housing, and FIG. 6 (B). Is 6- of FIG.
A plan view cut along line 6 and FIG. 6C shows a front view, respectively.

7A and 7B show a state in which the sub-assembly is closed after the lower-level sub-board is attached, FIG. 7A is a plan view, FIG. 7B is a front view,
FIG. 7C shows a side view together with the upper plate.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 Card edge connector assembly 2, 4 Substrate receiving recess 6 Housing 12 First contact 12 c Upper contact piece 12 d, 15 g Tine 13 Second contact 14, 15 Contact member 17 Conductive member 14 c Lower contact piece 20 Parent board 96, 98 Child board

Claims (1)

[Claims] An insulative housing extending in a longitudinal direction and formed in a plurality of stages in a vertical direction at a front portion thereof and attached to a parent substrate, and an upper side in each of the child substrate receiving recesses. And a plurality of contacts arranged in the longitudinal direction on the lower side, wherein each of the contacts is either an upper contact piece arranged on the upper side or a lower contact piece arranged on the lower side. A card which is connected to the parent board via tines, and which electrically connects the parent board and the child board by mounting the child board in each of the child board receiving recesses and making contact with the contact pieces; The edge connector assembly, wherein the plurality of contacts have the contact pieces on either side mounted over the respective steps from a rear part of the housing, and the tines are provided on the rear part. A plurality of separate first contact members having the plurality of integral first contacts and the contact pieces on the other side respectively mounted on the respective steps from the front portion of the housing, wherein the contact members are A card edge connector characterized in that the contact member located at the lowermost stage and connected to each other by a conductive member at the rear portion avoiding the daughter board receiving concave portion comprises a plurality of second contacts having the tines. Assembly.